Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Weighted-Average Assumptions for Fair Value of Employee Options Granted

The fair value of each employee option awarded was estimated on the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions.

	Year Ended December 31, 2015	Year Ended December 31, 2014	Year Ended December 31, 2013
Expected dividend yield	—%	N/A	N/A
Risk-free interest rate	1.71%	N/A	N/A
Expected volatility	44%	N/A	N/A
Expected life (in years)	6.75	N/A	N/A

Summary of Stock Option Activity

Stock option activity under the Plan for the years ended December 31, 2015, 2014, and 2013 was as follows:

	Year Ended December 31, 2015					Year Ended December 31, 2014					Year Ended December 31, 2013
	Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price		Options		Weighted Average Exercise Price
Options outstanding at beginning of year	419,238			$	8.66	576,651			$	8.66	576,651		$	8.66
Granted (1)	240,000			$	25.82	—			N/A		—		N/A
Exercised	(47,925		)	$	8.66	(157,413		)	$	8.66	—		N/A
Canceled	—			N/A		—			N/A		—		N/A
Options outstanding at end of year	611,313			$	15.40	419,238			$	8.66	576,651		$	8.66
Options vested and expected to vest	611,313			$	15.40	419,238			$	8.66	576,651		$	8.66
Options exercisable at end of year (2)	371,313			$	8.66	419,238			$	8.66	480,571		$	8.66
Price range of options exercised	$	8.66				$	8.66				N/A
Price range of options outstanding	$8.66-$25.82					$	8.66				$	8.66

(1) The weighted average grant date fair value of the stock options was $12.01

(2) No options vested during the year ended December 31, 2015. The fair value of shares vested during the years ended December 31, 2014 and 2013 was $1.2 million, and $1.4 million, respectively.

Summary of Stock Options Outstanding and Exercisable

The following table summarizes information about stock options granted to executives, directors, and non-executives that are outstanding and exercisable at December 31, 2015:

Outstanding						Exercisable
Exercise Price		Number of Shares	Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value		Number of Shares
$	8.66	371,313	6.75	$	2,911,094	371,313
25.82		240,000	9.25	—		—

Restricted Stock

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Restricted Shares Activity

During the years ended December 31, 2015, 2014, and 2013, the Company had the following activity relating to grants of time based restricted common stock: 

	Year Ended December 31, 2015				Year Ended December 31, 2014				Year Ended December 31, 2013
	Number of Shares		Weighted Avg Grant Date Fair Value		Number of Shares		Weighted Avg Grant Date Fair Value		Number of Shares		Weighted Avg Grant Date Fair Value
Non-vested shares at beginning of year	79,335		$	24.84	99,661		$	11.49	109,850		$	8.66
Granted	208,715		23.11		79,575		27.70		79,509		14.56
Vested	(55,571	)	23.24		(99,901	)	13.81		(89,698	)	10.74
Canceled (1)	(6,792	)	24.28		—		N/A		—		N/A
Non-vested shares at end of year	225,687		$	23.65	79,335		$	24.84	99,661		$	11.49

(1) Represents shares that were canceled as result of terminations of employment.

Performance-Based Restricted Stock

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Restricted Shares Activity

During the years ended December 31, 2015, 2014, and 2013 the Company had the following activity relating to grants of performance based restricted common stock: 

	Year Ended December 31, 2015				Year Ended December 31, 2014				Year Ended December 31, 2013
	Number of Shares		Weighted Avg Grant Date Fair Value		Number of Shares		Weighted Avg Grant Date Fair Value		Number of Shares		Weighted Avg Grant Date Fair Value
Non-vested shares at beginning of year	506,846		$	23.84	291,450		$	14.03	—		$	—
Granted	284,809		23.50		312,551		29.94		291,450		14.03
Vested	(154,467	)	19.58		(97,155	)	14.03		—		—
Canceled (1)	(156,431	)	28.86		—		N/A		—		—
Non-vested shares at end of year	480,757		$	24.18	506,846		$	23.84	$	291,450	$	14.03

(1) Represents shares that were canceled as a result of achievement of performance targets as outlined in the respective grant agreement at below the maximum levels, as well as a result of terminations of employment.